Omega Products ER11 Collet Coolant Sealed Ultra Precision - 10 Micron Run-Out - 4mm

The Omega ER11 Collet Coolant Sealed Ultra Precision is a precision toolholding solution for CNC milling and drilling that demands reliable coolant delivery and tight tool run-out. Designed for engineers, machinists, and serious hobbyists, it pairs ultra-low run-out with a robust coolant-sealed design to keep tools cutting accurately under demanding conditions.

With a 3–7 mm clamping range, this collet accommodates a broad range of small-diameter tooling. The seal supports high-pressure coolant up to 120 bar, ensuring efficient cooling and chip control. Newer versions use a metal-to-metal seal with no rubber nose seal, improving durability in tough environments. The longitudinal slots are arranged so they do not overlap at the center, preventing coolant loss during operation. For optimal performance, use only round shank tooling with no clamping flats; tooling with flats will render the seal ineffective.

• Ultra-precise run-out: Delivers under 10 μm run-out to ensure accurate tool positioning and smooth finishes on small-diameter workpieces.
• High-pressure coolant sealed design: Integral seal supports up to 120 bar coolant pressure, providing efficient cooling, better chip control, and longer tool life.
• Leak-free seal geometry with round-shank compatibility: Non-overlapping slots prevent coolant loss at the center, and optimal sealing requires round-shank tooling with no clamping flats for reliable, repeatable performance.

This coolant-sealed ER11 collet delivers dependable holding accuracy, improved cooling efficiency, and reduced downtime. By combining tight run-out with robust high-pressure sealing, it helps you achieve consistent finishes, longer tool life, and more productive machining sessions—especially when working with small-diameter tooling within the 3–7 mm range. Follow the tooling guidance to maximize seal integrity and minimize interruptions across jobs.